Skull Valley Band of Goshute Floodplain Management Plan
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MARCH 2018 SKULL VALLEY BAND OF GOSHUTE FLOODPLAIN MANAGEMENT PLAN Shambip Conservation District Skull Valley Band of Goshute Floodplain Management Plan Page left intentionally blank Skull Valley Band of Goshute Floodplain Management Plan TABLE OF CONTENTS INTRODUCTION ................................................................................................................................. 1 PURPOSE OF THE FLOODPLAIN MANAGEMENT PLAN .......................................................................... 1 FLOODPLAIN MANAGEMENT GOALS ................................................................................................... 2 Improve Emergency Response Capability ................................................................................................ 2 Develop Preventive Measures to Reduce Flood Damages ....................................................................... 2 Document the Flood History of Skull Valley ........................................................................................... 2 DEVELOPMENT OF THE FLOODPLAIN MANAGEMENT PLAN ................................................................. 2 Plan Participation ...................................................................................................................................... 2 Development Timeline ............................................................................................................................. 3 DESCRIPTION OF THE AREA ............................................................................................................... 6 Cultural Resources .................................................................................................................................... 8 Critical Structures ..................................................................................................................................... 8 FLOODPLAIN HAZARD ASSESSMENT ................................................................................................. 10 Flood Event 2013.................................................................................................................................... 12 Response Following 2013 Flood Event .................................................................................................. 14 Flood Event 2014.................................................................................................................................... 16 Response Following 2014 Flood Event .................................................................................................. 18 Older Flood Events ................................................................................................................................. 20 Climate Change ...................................................................................................................................... 21 ONGOING PROJECTS AND DEVELOPMENT PLANS .............................................................................. 22 MITIGATION STRATEGIES ................................................................................................................. 22 Strategy: Modifying Human Susceptibility to Flood Hazards ................................................................ 23 Strategy: Modifying the Impact of Flooding ......................................................................................... 24 Strategy: Preserving and Restoring Floodplains’ Environmental Quality ............................................. 24 Strategy: Modifying Floodwaters .......................................................................................................... 25 Strategies and Mitigation Actions Dashboard ........................................................................................ 26 GOALS AND MITIGATION ACTIONS ................................................................................................... 28 ACTION PLAN .................................................................................................................................. 30 i | Page Skull Valley Band of Goshute Floodplain Management Plan Development of Land Policies and Land Use Regulations .................................................................... 30 Flood Warning Systems .......................................................................................................................... 31 Emergency Action Plan .......................................................................................................................... 32 Elevation of Buildings ............................................................................................................................ 33 Relocation of Buildings .......................................................................................................................... 33 Flood Proofing Buildings in the Floodplain ........................................................................................... 34 Fill or Conversion of a Basement with Main Floor Addition for Buildings ........................................... 36 Acquisition of Buildings ......................................................................................................................... 36 Berms ...................................................................................................................................................... 37 Information and Education ..................................................................................................................... 37 Flood Insurance ...................................................................................................................................... 40 Community Rating System ..................................................................................................................... 40 Tax Adjustments and Rebates ................................................................................................................ 41 Emergency Relief ................................................................................................................................... 41 Post-Flood Recovery Processes .............................................................................................................. 42 Wetlands Protection and Restoration...................................................................................................... 42 Erosion and Sediment Control ................................................................................................................ 43 Water Quality Enhancement ................................................................................................................... 43 Enhancement of Recreational and Educational Opportunities ............................................................... 44 Preservation of Cultural Resources ........................................................................................................ 44 Dams ....................................................................................................................................................... 45 Stormwater Detention and Retention Basins .......................................................................................... 45 Levees ..................................................................................................................................................... 45 Floodwalls .............................................................................................................................................. 46 Landforms ............................................................................................................................................... 46 Channel Alterations and Diversions ....................................................................................................... 46 Pump Stations ......................................................................................................................................... 47 Engineering Study .................................................................................................................................. 47 Fire Suppression Actions ........................................................................................................................ 48 Floodplain Management Plan Adoption ................................................................................................. 48 Tribal Mitigation Plan Adoption ............................................................................................................ 49 Planning Assistance to States Project ..................................................................................................... 49 PRIORITIZATION OF MITIGATION ACTIONS ....................................................................................... 50 PLAN MAINTENANCE PROCESS ........................................................................................................ 53 ii | Page Skull Valley Band of Goshute Floodplain Management Plan Responsibility for Plan Maintenance ...................................................................................................... 53 Monitoring, Evaluation, and Updating the Plan ..................................................................................... 53 Monitoring the Process of Mitigation Actions ....................................................................................... 53